exoclock

HAT-P-4b (LOW)

Discovered by: Kovács et al. 2007

The Star
Simbad
GAIA
2MASS
BD+36 2593
DR2 1291120362349158016
J15195792+3613467
RA 15:19:57.9205 DEC +36:13:46.737
Parallax
3.092 mas
P.M. RA
-21.661 mas/y
P.M. DEC
-24.25 mas/y
MagV
11.12
MagR*
10.848
MagI*
10.443
MagJ
10.1
MagH
9.837
MagK
9.77
MagG
11.063
MagGBP
11.39
MagGRP
10.605
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2022
Mid-time
2455584.57238 ± 0.00018 BJDTDB
Period
3.05652301 ± 2.9e-07 days

Transit Parameters
Christiansen et al. 2011
Rp/Rs
0.086 ± 0.008
a/Rs
6.0 +0.3 -0.3
i
89.7 +0.3 -0.3 deg
e
-
ω
- deg
DepthR*
9.84 mmag
Duration*
4.25 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Torres et al. 2008
Teff
5860.0 +80.0 -80.0 K
Log(g)
4.36 +0.11 -0.11 cm/s2
Fe/H
0.24 +0.08 -0.08 dex
ExoClock Status
Observing Priority LOW
Minimum aperture 5.11"
Total Observations (Recent) 35 (5)
O-C 0.61 ± 0.69 minutes
ExoClock Observations (Recent) 16 (5)
Space Observations (Recent) 5 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 14 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.08495 ± 0.00055

HAT-P-4b


ExoClock Observations

Planet
Observation Date
Observer
Observatory
Telescope
Camera / Filter / Exp [s]
O-C
minutes
HAT-P-4b (LOW)
2022-06-13
Yves Jongen
Rasteau Observatory
Plane Wave CDK 17"
SBIG STXL 11002 / R / 90.0
2.88 ± 1.58
HAT-P-4b (LOW)
2022-06-13
Stephen M. Brincat
Flarestar Observatory - MPC Code:171
Meade SCT
Moravian G2-1600 / Clear / 120.0
0.0 ± 2.3
HAT-P-4b (LOW)
2022-06-10
Gianfranco Ferrini
K83
Meade
Sbig St8XME / Clear / 110.0
-1.26 ± 2.16
HAT-P-4b (LOW)
2022-04-19
Manfred Raetz
privat observatory Herges-Hallenberg
SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / Clear / 120.0
0.46 ± 1.15
HAT-P-4b (LOW)
2022-04-16
Leon Bewersdorff
Observatory Kipshoven (BLEW)
GSO Ritchey-Chrétien
QHY268M-PH / V / 140.0
-1.81 ± 4.32
HAT-P-4b (LOW)
2021-04-05
Simon Dawes
William James II Observatory
Skywatcher MN190 2
ZWO ASI 1600MM-PRO USB 3.0 Mono Camera / R / 60.0
5.0 ± 2.59
HAT-P-4b (LOW)
2021-04-05
David Wright
Yorick (private observatory)
10" Ritchey-Chretien
QSI 683WSG-8 / R / 90.0
-1.48 ± 2.45
HAT-P-4b (LOW)
2021-04-05
Martin Crow
Burnham Observatory
Celestron C9.25
SX694 mono / R / 60.0
-1.77 ± 2.3
HAT-P-4b (LOW)
2020-07-07
Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave
SBIG STL11K / Clear / 120.0
-3.0 ± 3.17
HAT-P-4b (LOW)
2020-03-26
Manfred Raetz
privat observatory Herges-Hallenberg
SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / Clear / 120.0
1.59 ± 1.87
HAT-P-4b (LOW)
2020-03-26
John Savage
Z42 Rushay Farm Observatory
Celeston 14Edge with focal reducer
ATIK One 9.0 / R / 90.0
-2.45 ± 3.02
HAT-P-4b (LOW)
2019-03-16
Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave
SBIG STL11K / V / 120.0
3.93 ± 3.17
HAT-P-4b (LOW)
2018-04-19
Yves Jongen
Rasteau Observatory
Plane Wave CDK 17"
SBIG STXL 11002 / Clear / 120.0
0.74 ± 1.73
HAT-P-4b (LOW)
2018-04-19
Alessandro Marchini
Astronomical Observatory University of Siena
Mak-Cas 0.3m f/5.6
Sbig STL-6303 / I / 180.0
0.31 ± 3.46
HAT-P-4b (LOW)
2015-06-27
Anaël Wünsche
Observatoire des Baronnies Provençales
Astelco
FLIPL230 / V / 120.0
1.94 ± 1.3
HAT-P-4b (LOW)
2014-04-16
Claudio Lopresti
Claudio Lopresti
Mak-Newton
CCD Sbig ST10xme / R / 240.0
5.38 ± 5.76

Space Observations

Planet
Observation Date
Mission O-C
minutes
HAT-P-4b (LOW)
2020-05-10
TESS-0.97 ± 1.01
HAT-P-4b (LOW)
2020-05-07
TESS1.4 ± 0.98
HAT-P-4b (LOW)
2020-05-04
TESS-0.65 ± 1.15
HAT-P-4b (LOW)
2020-04-25
TESS0.58 ± 1.15
HAT-P-4b (LOW)
2020-04-22
TESS-1.09 ± 0.96

Literature Mid-times

Planet
Observation Date
Reference O-C
minutes
2016-03-13 Wang et al. 2021 2.29 ± 1.58
2010-03-29 Winn et al. 2011 -0.25 ± 1.05
2008-07-07 Christiansen et al. 2011 -0.31 ± 0.94
2008-07-04 Christiansen et al. 2011 -2.28 ± 0.94
2008-07-01 Christiansen et al. 2011 0.94 ± 0.92
2008-02-12 Christiansen et al. 2011 0.23 ± 0.81
2008-02-09 Christiansen et al. 2011 1.52 ± 1.18
2008-02-06 Christiansen et al. 2011 -1.33 ± 0.81
2008-02-03 Christiansen et al. 2011 -2.46 ± 1.01
2008-01-30 Christiansen et al. 2011 0.58 ± 0.81
2008-01-27 Christiansen et al. 2011 -0.86 ± 0.88
2008-01-24 Christiansen et al. 2011 -2.8 ± 1.04
2007-05-28 Kovács et al. 2007 0.68 ± 0.86
2007-05-25 Kovács et al. 2007 1.15 ± 0.43
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